Final answer:
Franklin D. Roosevelt had the highest percentage of his regular vetoes overridden, which occurred under a divided government. President Bill Clinton had a relatively low percentage of his vetoes overridden.
Step-by-step explanation:
The president with the highest percentage of his regular vetoes overridden was Franklin D. Roosevelt, with 12% of his regular vetoes overridden. This occurred under a divided government, as Franklin D. Roosevelt served as president from 1933 to 1945, during which time Republicans controlled the House of Representatives for most of his presidency. President Bill Clinton had 2% of his regular vetoes overridden. From this number, we can conclude that President Clinton had a relatively low percentage of his vetoes overridden, indicating a higher level of support and cooperation from the Congress during his presidency.